Internal-combustion engine.



'PATENTED-MAR. 5, 1907.

H. G. UNDERWOOD.- NAL COMBUSTION ENGINE- APPLIOATION FILED OUT-2 INTER 2 SHEETS-SHEET 1L H. G. UN-DERWOOD.- INTERNAL COMBUSTION ENGINE A'BPLIOATION FILED OCT. 25, 1905.

'PATENTED MAR. 5, 1907.

2 SHEETSSHEET 2.

bustion engines and for regulating the adhereinafter with reference tojthe accompany UNITED STATES PATENT OFFICE.

HERBERT c. UNDERWOOD, OF NEW YORK, N. Y.

INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

rate'nted Mar-c315, 1907.

Originalapplieation filed lunel, 1905, Serial No, 26%.042. Divided and this application filed October 25,1905. Serial No 284,270-

at New Brighton, borough of Richmond, city ofNew York, State of New York; have invented certain new and useful Improvements in Internal-Combustion Engines, of which the following is a specification, reference he ing had to the accompanying drawing,for

ing a part hereof, this application being a division of application Serial No.- 264,042,"-.

filed June 7,1905.-

This invention relates particularly. tothe ineans for controlling the charge or fuel. mixture of air and gas or vapor for internal-conimission of the charge to the working. cylinder. The 1IlVGIltlOn.Wlll be more fully explained ing drawings, imwhich it 'is-illustrated as embodied in a convenient and practical form;

In said'drawings; Figure 121s a front elevawhich the-"present improvement isapplied.

the plane indicated r Fig. 41s a detail view in section-on the hori- 30 Fig 1s a view of theupperportionthereof in side elevation. Fig.3 is aview invertical "section of the upperilpplrtion thgreof on y t 6 nc 33 0 Fig; 2.

z ontal plane indicated by the'line 4. '4 of; Fig. 1.] Fig. .5 is a- 'detail view, onan enlarged scale; of a portion'ofthe governor inechanism. r

. In the engine re resented-in the-drawings- 5 ,the working cylind by struts bu secured the" er a is suitably supported on a base plate 'b,'to w 0.. The

with studs (1, which project from the up- The latter communicates of the cylinder?mfAsgwill be observed by: reference to Fig, 3,"the'jtrxmk-piston 21'; when 1 in itshighest; osition extends nearly. to the head at of .t e cylinder' eit'ension a its length being greater, thanit s stroke, so that the slots ia J'in the cylinderw all are always; glc adjustably supported throughascrew is covered by the trunk' pistoris; The pistond is provided near ts forwardor head endwith a port d which is adapted to' 'register as the piston appro aches the limit of itsforward stroke with a port a fin the cylinder wall;

with a chamber a in which the airs m xed with theiuel'hasis jWiiJll'flIi inwardlyopen ng valve -h held normally to its seatby a spring k -The tremity of the pi arm 13, by which t.

1011 are earings for the crank-shaft e; the c linder-headzbeingat that'e'nd of the cylin erwhich is nearest to the-crankshaft, ldependentupon cranks :cjare connected byj'pitmen .,normal'gop erat on-Iof the engine overlies extens on of the arm a? I '--as the lever his swung up and dowr,

der-that is, with the working cylinder througha port a,'which is likewise uncov approaches the limit 'ered by the piston as it oiits upward or vforward stroke, 1 An exhaust-'portfa is also provided in the wall of the working'cylinder'to he uncovered by the piston it ap ward stroke.

roaeh'esthe'limit of its for h 'in such position nfthe wall of thecylinder (:BXiGBIISlOIl a are also provided airnl t'port'sw as to be uncovered'by the piston as thefllatter apprdaches..the-limit oif'j its downward or J- rearward stroke. f With this construction the' air admittedthmugh v the ports a is compressed-during the i'oriward" movement of the'piston and isawdmittcd to; the working cylinder as the'piston completes its'forward stroke.

The fuel, basis of v'e-chamb erh within the mixing ch amher a The extremity of the pipe is provided,

which is w r the explosive 'inixture is supplied from any-suitable source through a pi e h, which is providedwith a nozzle and. idol of an mternal-combustion engine to veil stem of the valve h prowctsheyopd the ex;

e it intoe valve is opened to er mit the escape of the proper quantity to for'ni' the basis of the explosive mixture: The arm i is secured to 'ashaft i ,1whichis ex:

thepath of-tan of ma tended through the wall of the mixing-chains her a and is provided exteriorl with an i adapted to. be acted-upon ing part of the engine oiop t er re hi the proper instant. I the engine shown the valve'is operatedbya mechanism which lwhich constitutes {a vibrating carrier *ther'ee "for is pivoted a pendulurn arml, which is down; as:

the speed ofitheengin'epry-71n-v governor device's: As;

is connected bye-link with one of the it-- men so time pressed normally-1 fonedireotion by a spring upenj-gmarmikiof theiever is. Y The panda-1 lum is; provjded'with' a finger Z, Villliil in, the

" v chamber atriangular block m too fast, but to prevent also theadmiss'ion to 10 if the engine-runs shaft 11 that the finger Z thereof. fails to en-.-

gage the arm i and the valve h therefore is .not opened to admit more fluid.

It may be desirable not only to prevent th admission of fuel when the engine is running the Working cylinder of Whatever mixture there may be in the mixing-chamber a and even of additional air. For this PLIIDOSG there-is provided a butterfly-valve m, mounted within the mixing-chamber a upon a shaft m, which carries outside of the mixingm is secured to'tlie supporting-bracket to e0 operate with' the block m and maintain the valve in one position or the other, as the case may be, The block m 'is also provided with lugs mfi andm which erate with a finger 1?, also carried by the pendulum Z. Normally thevalve 'm' stands in the position represented k passage unobstructed but too fast and the admission of fuel is cut oil by the action of the pendulum Z then at the same time the fingerv Z of the pendulum swings into position to strike the lug m on the block m rocking the shaft and the valve m into the position of the latter,

and 5, leaving the (indicated by dotted lines) in which it pretion is not to A flat spring are arranged to coop-' in full lines in Figs. 3

itially as described.

this 24th vents the passage o'fair o'r vapor throughthe mixing chamber, As soon as the engine resumes normal speed then the finger Z strikes the lug m of the block W and restores the valve to its operative position.

It Will be 11nd may be made in the detailsof construction and arrangement of parts and that the invenbe limited to the precise construction and-arrangement shown and described herein.

I claim as my invention- In an internal-combustion engine, thecom:

bination of a'w'orking cylinder, an' air-compressor connected to sa d cylinder, a mixingvchamber included in said connection, means to supply the fuel basis of the charge to saidchamber, a valve to control the passage from said chamber to said cylinder, a valve-stem carrying two projections, a vibrating carrire, a pendulum mounted .on said carrierand erstood. that various changes adapted to engage one or the other of said projections to shift the valve and retain the valve in This specification signed-and witnessed day of October,-1905 HERBERT e. UNnERWoon In presence of- THOMAS J. CANrY.. W. B. GREELEY,' I

means to. either position, substan 

